Since expressions require that units be correct, a useful habit to develop is checking units.

Consider the following variables:

X is measured in units of time

Y is measured in units of distance

Z is measured in units of distance$/$time$2$

Q is measured in units distance$/$time

Using this information determine which of these expressions is impossible.

Group of answer choices

X $=($Y$/$Z$)$

Y$/$X $=$ ZY$/$Q

Y $=$ Q$2/$Z $+$ QX

ZY $=$ Q$2+$ Y$2/$X